Chris Card
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 Dec11 awarded Caucus Oct17 awarded Popular Question Aug24 awarded Yearling Apr29 awarded Nice Answer Jan25 awarded Good Question Aug24 awarded Yearling Apr23 awarded Notable Question Oct30 answered Solving a division with imaginary numbers Oct24 comment When does a higher order polynomial have complex roots? I think mac389 is asking about non-real roots (all real numbers being complex numbers too). Oct17 revised continuously differential parametrization of a tricky surface added 277 characters in body Oct17 answered continuously differential parametrization of a tricky surface Oct16 comment Positive and Negative Real numbers yes, but only when x is positive Oct16 answered Positive and Negative Real numbers Sep10 awarded Nice Question Sep4 awarded Enlightened Sep4 awarded Nice Answer Aug24 awarded Yearling May7 awarded Nice Answer May4 revised How Can One Prove $\cos(\pi/7) + \cos(3 \pi/7) + \cos(5 \pi/7) = 1/2$ added 595 characters in body May3 answered How Can One Prove $\cos(\pi/7) + \cos(3 \pi/7) + \cos(5 \pi/7) = 1/2$